物理化学学报 >> 1988, Vol. 4 >> Issue (01): 71-73.doi: 10.3866/PKU.WHXB19880113

研究简报 上一篇    下一篇

硫酸铈中铈的价态及其温度依赖性的XPS研究

赵良仲   

  1. 中国科学院化学研究所
  • 收稿日期:1986-07-27 修回日期:1986-10-30 发布日期:1988-02-15
  • 通讯作者: 赵良仲

XPS STUDIES OF MIXED VALENCE IN CERIC SULFATE AND ITSTEMPERATURE DEPENDENCE

Zhao Liangzhong   

  1. Institute of Chemistry; Academia Sinica
  • Received:1986-07-27 Revised:1986-10-30 Published:1988-02-15
  • Contact: Zhao Liangzhong

Abstract: XPS studies show that ceric sulfate seems to be a mixed valent compound. The ground state is considered as a mixture of two configurations, i.e. 4f~0 and 4f~1. The products of thermal decomposition of ceric sulfate and hence the valence of cerium are related to temperature. For example, after heating Ce(SO_4)_2·4H_2O at temperature between 250 ℃ and 700 ℃ for 2 hours, cerous sulfate (or probably also cerous oxysulfates) were formed. After heating at 800 ℃ for 2 hours, Ce(SO_4)_2·4H_2O was ultimately decomposed into CeO_2.